*Edge*
 
* Fix Ruby's Time marshaling bug in pre-1.9 versions of Ruby: utc instances are now correctly unmarshaled with a utc zone instead of the system local zone [#900 state:resolved] [Luca Guidi, Geoff Buesing]
 
* Add Array#in_groups which splits or iterates over the array in specified number of groups. #579. [Adrian Mugnolo] Example:
  
  a = (1..10).to_a
  a.in_groups(3)        #=> [[1, 2, 3, 4], [5, 6, 7, nil], [8, 9, 10, nil]]
  a.in_groups(3, false) #=> [[1, 2, 3, 4], [5, 6, 7], [8, 9, 10]]
 
* Fix TimeWithZone unmarshaling: coerce unmarshaled Time instances to utc, because Ruby's marshaling of Time instances doesn't respect the zone [Geoff Buesing]
 
* Added Memoizable mixin for caching simple lazy loaded attributes [Josh Peek]
 
* Move the test related core_ext stuff out of core_ext so it's only loaded by the test helpers.  [Michael Koziarski]
 
* Add Inflection rules for String#humanize. #535 [dcmanges]
 
  ActiveSupport::Inflector.inflections do |inflect|
    inflect.human(/_cnt$/i, '\1_count')
  end
 
  'jargon_cnt'.humanize # => 'Jargon count'
 
* TimeWithZone: when crossing DST boundary, treat Durations of days, months or years as variable-length, and all other values as absolute length. A time + 24.hours will advance exactly 24 hours, but a time + 1.day will advance 23-25 hours, depending on the day. Ensure consistent behavior across all advancing methods [Geoff Buesing]
 
* Added TimeZone #=~, to support matching zones by regex in time_zone_select. #195 [Ernie Miller]
 
* Added Array#second through Array#tenth as aliases for Array#[1] through Array#[9] [DHH]
 
* Added test/do declaration style testing to ActiveSupport::TestCase [DHH via Jay Fields]
 
* Added Object#present? which is equivalent to !Object#blank? [DHH]
 
* Added Enumberable#many? to encapsulate collection.size > 1 [DHH/Damian Janowski]
 
* Add more standard Hash methods to ActiveSupport::OrderedHash [Steve Purcell]
 
* Namespace Inflector, Dependencies, OrderedOptions, and TimeZone under ActiveSupport [Josh Peek]
 
* Added StringInquirer for doing things like StringInquirer.new("production").production? # => true and StringInquirer.new("production").development? # => false [DHH]
 
* Fixed Date#end_of_quarter to not blow up on May 31st [#289 state:resolved] (Danger)
 
 
*2.1.0 (May 31st, 2008)*
 
* TimeZone#to_s shows offset as GMT instead of UTC, because GMT will be more familiar to end users (see time zone selects used by Windows OS, google.com and yahoo.com.) Reverts [8370] [Geoff Buesing]
 
* Hash.from_xml: datetime xml types overflow to Ruby DateTime class when out of range of Time. Adding tests for utc offsets [Geoff Buesing]
 
* TimeWithZone #+ and #- : ensure overflow to DateTime with Numeric arg [Geoff Buesing]
 
* Time#to_json: don't convert to utc before encoding. References #175 [Geoff Buesing]
 
* Remove unused JSON::RESERVED_WORDS, JSON.valid_identifier? and JSON.reserved_word? methods. Resolves #164. [Cheah Chu Yeow]
 
* Adding Date.current, which returns Time.zone.today if config.time_zone is set; otherwise returns Date.today [Geoff Buesing]
 
* TimeWithZone: date part getter methods (#year #mon #day etc) are defined on class; no longer relying on method_missing [Geoff Buesing]
 
* Time.zone.parse return nil for strings with no date information [Geoff Buesing]
 
* Time.zone.parse respects offset information in string. Resolves #105. [Scott Fleckenstein, Geoff Buesing]
 
* Added Ruby 1.8 implementation of Process.daemon
 
* Duration #since and #ago with no argument (e.g., 5.days.ago) return TimeWithZone when config.time_zone is set. Introducing Time.current, which returns Time.zone.now if config.time_zone is set, otherwise just returns Time.now [Geoff Buesing]
 
* Time#since behaves correctly when passed a Duration. Closes #11527 [kemiller]
 
* Add #getutc alias for DateTime#utc [Geoff Buesing]
 
* Refactor TimeWithZone: don't send #since, #ago, #+, #-, #advance through method_missing [Geoff Buesing]
 
* TimeWithZone respects config.active_support.use_standard_json_time_format [Geoff Buesing]
 
* Add config.active_support.escape_html_entities_in_json to allow disabling of html entity escaping.  [rick]
 
* Improve documentation. [Xavier Noria]
 
* Modified ActiveSupport::Callbacks::Callback#call to accept multiple arguments.
 
* Time #yesterday and #tomorrow behave correctly crossing DST boundary. Closes #7399 [sblackstone]
 
* TimeWithZone: Adding tests for dst and leap day edge cases when advancing time [Geoff Buesing]
 
* TimeWithZone#method_missing: send to utc to advance with dst correctness, otherwise send to time. Adding tests for time calculations methods [Geoff Buesing]
 
* Add config.active_support.use_standard_json_time_format setting so that Times and Dates export to ISO 8601 dates.  [rick]
 
* TZInfo: Removing unneeded TimezoneProxy class [Geoff Buesing]
 
* TZInfo: Removing unneeded TimezoneIndexDefinition, since we're not including Indexes::Timezones [Geoff Buesing] 
 
* Removing unnecessary uses_tzinfo helper from tests, given that TZInfo is now bundled [Geoff Buesing]
 
* Bundling abbreviated version of TZInfo gem 0.3.8: only the classes and zone definitions required to support Rails time zone features are included. If a recent version of the full TZInfo gem is installed, this will take precedence over the bundled version [Geoff Buesing]
 
* TimeWithZone#marshal_load does zone lookup via Time.get_zone, so that tzinfo/Olson identifiers are handled [Geoff Buesing]
 
* Time.zone= accepts TZInfo::Timezone instances and Olson identifiers; wraps result in TimeZone instance [Geoff Buesing] 
 
* TimeWithZone time conversions don't need to be wrapped in TimeOrDateTime, because TZInfo does this internally [Geoff Buesing]
 
* TimeWithZone#usec returns 0 instead of error when DateTime is wrapped [Geoff Buesing]
 
* Improve documentation. [Radar, Jan De Poorter, chuyeow, xaviershay, danger, miloops, Xavier Noria,  Sunny Ripert]
 
* Ensure that TimeWithZone#to_yaml works when passed a YAML::Emitter.  [rick]
 
* Ensure correct TimeWithZone#to_date [Geoff Buesing]
 
* Make TimeWithZone work with tzinfo 0.2.x: use TZInfo::Timezone#zone_identifier alias for #abbreviation, silence warnings on tests. Raise LoadError when TZInfo version is < 0.2 by sniffing for TZInfo::TimeOrDateTime constant. Move all tzinfo-dependent TimeZone tests into uses_tzinfo block [Geoff Buesing]
 
* Time, DateTime and TimeWithZone #in_time_zone defaults to Time.zone. Removing now unneeded #in_current_time_zone [Geoff Buesing]
 
* TZInfo caches Timezone instances in its own internal hash cache, so TimeZone::MAPPING doesn't need to cache them as well [Geoff Buesing]
 
* Adding TimeZone#parse [Geoff Buesing]
 
* Adding TimeZone#at and DateTime#to_f [Geoff Buesing]
 
* TimeWithZone responds to Ruby 1.9 weekday-named query methods [Geoff Buesing]
 
* TimeWithZone caches TZInfo::TimezonePeriod used for time conversion so that it can be reused, and enforces DST rules correctly when instance is created from a local time [Geoff Buesing]
 
* Fixed that BufferedLogger should create its own directory if one doesn't already exist #11285 [lotswholetime]
 
* Fix Numeric time tests broken by DST change by anchoring them to fixed times instead of Time.now. Anchor TimeZone#now DST test to time specified with Time.at instead of Time.local to work around platform differences with Time.local and DST representation [Geoff Buesing]
 
* Removing unneeded #change_time_zone method from Time, DateTime and TimeWithZone [Geoff Buesing]
 
* TimeZone #local and #now correctly enforce DST rules [Geoff Buesing]
 
* TimeWithZone instances correctly enforce DST rules. Adding TimeZone#period_for_utc [Geoff Buesing]
 
* test_time_with_datetime_fallback expects DateTime.local_offset instead of DateTime.now.offset [Geoff Buesing]
 
* Adding TimeWithZone #marshal_dump and #marshal_load [Geoff Buesing]
 
* Add OrderedHash#to_hash [josh]
 
* Adding Time#end_of_day, _quarter, _week, and _year.  #9312 [Juanjo Bazan, Tarmo Tänav, BigTitus]
 
* Adding TimeWithZone#between? [Geoff Buesing]
 
* Time.=== returns true for TimeWithZone instances [Geoff Buesing]
 
* TimeWithZone #+ and #- behave consistently with numeric arguments regardless of whether wrapped time is a Time or DateTime; consistenty answers false to #acts_like?(:date) [Geoff Buesing]
 
* Add String#squish and String#squish! to remove consecutive chunks of whitespace.  #11123 [jordi, Henrik N]
 
* Serialize BigDecimals as Floats when using to_yaml. #8746 [ernesto.jimenez]
 
* Adding TimeWithZone #to_yaml, #to_datetime, #eql? and method aliases for duck-typing compatibility with Time [Geoff Buesing]
 
* TimeWithZone #in_time_zone returns +self+ if zone argument is the same as #time_zone [Geoff Buesing]
 
* Adding TimeWithZone #to_a, #to_f, #to_i, #httpdate, #rfc2822 [Geoff Buesing]
 
* Pruning unneeded TimeWithZone#change_time_zone_to_current [Geoff Buesing]
 
* Time#zone=, #in_time_zone and #change_time_zone accept a Duration [Geoff Buesing]
 
* Time#in_time_zone handles Time.local instances correctly [Geoff Buesing]
 
* Pruning unneeded Time#change_time_zone_to_current. Enhanced docs to #change_time_zone to explain the difference between this method and #in_time_zone [Geoff Buesing]
 
* TimeZone#new method renamed #local; when used with Time.zone, constructor now reads: Time.zone.local() [Geoff Buesing]
 
* Added Base64.encode64s to encode values in base64 without the newlines. This makes the values immediately usable as URL parameters or memcache keys without further processing [DHH]
 
* Remove :nodoc: entries around the ActiveSupport test/unit assertions.  #10946 [dancroak, jamesh]
 
* Add Time.zone_default accessor for setting the default time zone.  Rails::Configuration.time_zone sets this.  #10982 [Geoff Buesing]
 
* cache.fetch(key, :force => true) to force a cache miss.  [Jeremy Kemper]
 
* Support retrieving TimeZones with a Duration.  TimeZone[-28800] == TimeZone[-480.minutes].  [rick]
 
* TimeWithZone#- added, so that #- can handle a Time or TimeWithZone argument correctly [Geoff Buesing]
 
* with_timezone test helper renamed with_env_tz, to distinguish between setting ENV['TZ'] and setting Time.zone in tests [Geoff Buesing]
 
* Time#- coerces TimeWithZone argument to a Time instance so that difference in seconds can be calculated. Closes #10914 [Geoff Buesing, yyyc514]
 
* Adding UTC zone to TimeZone; TimeWithZone no longer has to fake UTC zone with nil [Geoff Buesing]
 
* Time.get_zone refactored to private method, given that the encapsulated logic is only useful internally [Geoff Buesing]
 
* Time.zone uses thread-local variable for thread safety. Adding Time.use_zone, for overriding Time.zone locally inside a block. Removing unneeded Time.zone_reset! [Geoff Buesing]
 
* TimeZone#to_s uses UTC rather than GMT; reapplying change that was undone in [8679]. #1689 [Cheah Chu Yeow]
 
* Time.days_in_month defaults to current year if no year is supplied as argument #10799 [Radar], uses Date.gregorian_leap? to determine leap year, and uses constant lookup to determine days in month [Geoff Buesing]  
 
* Adding Time and DateTime #compare_with_coercion, which layers behavior on #<=> so that any combination of Time, DateTime and ActiveSupport::TimeWithZone instances can be chronologically compared [Geoff Buesing]
 
* TimeZone#now returns an ActiveSupport::TimeWithZone [Geoff Buesing]
 
* Time #in_current_time_zone and #change_time_zone_to_current return self when Time.zone is nil [Geoff Buesing]
 
* Remove unneeded #to_datetime_default_s alias for DateTime#to_s, given that we inherit a #to_default_s from Date that does exactly the same thing [Geoff Buesing]
 
* Refactor Time and DateTime #to_formatted_s: use ternary instead of nested if/else [Geoff Buesing]
 
* Adding Time and DateTime #formatted_offset, for outputting +HH:MM utc offset strings with cross-platform consistency [Geoff Buesing]
 
* Adding alternate_utc_string option to TimeZone#formatted_offset. Removing unneeded TimeZone#offset. [Geoff Buesing]
 
* Introduce ActiveSupport::TimeWithZone, for wrapping Time instances with a TimeZone. Introduce instance methods to Time for creating TimeWithZone instances, and class methods for managing a global time zone. [Geoff Buesing]
 
* Replace non-dst-aware TimeZone class with dst-aware class from tzinfo_timezone plugin. TimeZone#adjust and #unadjust are no longer available; tzinfo gem must now be present in order to perform time zone calculations, via #local_to_utc and #utc_to_local methods. [Geoff Buesing]
 
* Extract ActiveSupport::Callbacks from Active Record, test case setup and teardown, and ActionController::Dispatcher.  #10727 [Josh Peek]
 
* Introducing DateTime #utc, #utc? and #utc_offset, for duck-typing compatibility with Time. Closes #10002 [Geoff Buesing]
 
* Time#to_json uses Numeric#to_utc_offset_s to output a cross-platform-consistent representation without having to convert to DateTime. References #9750 [Geoff Buesing]
 
* Refactor number-to-HH:MM-string conversion logic from TimeZone#formatted_offset to a reusable Numeric#to_utc_offset_s method. [Geoff Buesing]
 
* Continue evolution toward ActiveSupport::TestCase.  #10679 [Josh Peek]
 
* TestCase: introduce declared setup and teardown callbacks. Pass a list of methods and an optional block to call before setup or after teardown. Setup callbacks are run in the order declared; teardown callbacks are run in reverse.  [Jeremy Kemper]
 
* Added ActiveSupport::Gzip.decompress/compress(source) as an easy wrapper for Zlib [Tobias Luetke]
 
* Included MemCache-Client to make the improved ActiveSupport::Cache::MemCacheStore work out of the box [Bob Cottrell, Eric Hodel]
 
* Added ActiveSupport::Cache::* framework as an extraction from ActionController::Caching::Fragments::* [DHH]
 
* Fixed String#titleize to work for strings with 's too #10571 [trek]
 
* Changed the implementation of Enumerable#group_by to use a double array approach instead of a hash such that the insert order is honored [DHH/Marcel]
 
* remove multiple enumerations from ActiveSupport::JSON#convert_json_to_yaml when dealing with date/time values.  [rick]
 
* Hash#symbolize_keys skips keys that can't be symbolized.  #10500 [Brad Greenlee]
 
* Ruby 1.9 compatibility.  #1689, #10466, #10468, #10554, #10594, #10632 [Cheah Chu Yeow, Pratik Naik, Jeremy Kemper, Dirkjan Bussink, fxn]
 
* TimeZone#to_s uses UTC rather than GMT.  #1689 [Cheah Chu Yeow]
 
* Refactor of Hash#symbolize_keys! to use Hash#replace.  Closes #10420 [ReinH]
 
* Fix HashWithIndifferentAccess#to_options! so it doesn't clear the options hash.  Closes #10419 [ReinH]
 
 
*2.0.1* (December 7th, 2007)
 
* Added Array#from and Array#to that behaves just from String#from and String#to [DHH]
 
* Fix that empty collections should be treated as empty arrays regardless of whitespace for Hash#from_xml #10255 [adamj]
 
* Time#time_with_datetime_fallback, Time#to_datetime, Date#to_datetime and String#to_datetime honor Ruby's default calendar reform setting. #10201 [Geoff Buesing]
 
* Change Time and DateTime #end_of_month to return last second of month instead of beginning of last day of month. Closes #10200 [Geoff Buesing]
 
* Speedup String#blank?  [Jeremy Kemper, Koz]
 
* Add documentation for Hash#diff. Closes #9306 [Tarmo Tänav]
 
* Add new superclass_delegating_accessors.  Similar to class inheritable attributes but with subtly different semantics. [Koz, Tarmo Tänav]
 
* Change JSON to encode %w(< > &) as 4 digit hex codes to be in compliance with the JSON spec.  Closes #9975 [Josh Peek, Cheah Chu Yeow, Tim Pope]
 
* Fix JSON encoding/decoding bugs dealing with /'s.  Closes #9990 [Rick, theamazingrando]
 
* Introduce a base class for all test cases used by rails applications. ActiveSupport::TestCase [Koz]
 
  The intention is to use this to reduce the amount of monkeypatching / overriding that 
  is done to test/unit's classes.
 
* Document Enumerable and Hash #to_json.  #9970 [Cheah Chu Yeow]
 
* Hash#to_xml handles symbol values.  #9954 [Assaf]
 
* Hash#symbolize_keys behaves well with integer keys.  #9890 [PotatoSalad]
 
* Multibyte: String#slice supports regexp argument.  #9646 [yob]
 
* object.duplicable? returns true if object.dup is safe. False for nil, true, false, symbols, and numbers; true otherwise.  #9333 [sur]
 
* Time, Date and DateTime #advance accept :weeks option.  #9866 [Geoff Buesing]
 
* Fix Time#years_ago and #years_since from leap days.  #9865 [Geoff Buesing]
 
* Time and DateTime#advance accept :hours, :minutes, and :seconds options.  #9825 [Geoff Buesing]
 
* Fix Date#years_ago and #years_since from leap days.  #9864 [Geoff Buesing]
 
* Refactor Time and Date#months_since and #months_ago to use #advance.  #9863 [Geoff Buesing]
 
* Rebundle Builder 2.1.2 but prefer a newer RubyGem if available.  [Jeremy Kemper]
 
* Add Range#overlaps?(range), Range#include?(range), and Range#step without a block. [brandon]
 
* Correct BufferedLogger#level? checks.  #9806 [wildchild, Johan Sorensen]
 
* String#to_xs uses Eric Wong's fast_xs extension, if available, for Builder speedup.  http://bogomips.org/fast_xs/  [Jeremy Kemper]
 
* Introduce BasicObject as Builder::BlankSlate for Ruby 1.9 forward compatibility.  [Jeremy Kemper]
 
* Unbundle Builder in favor of a gem dependency.  [Jeremy Kemper]
 
* Disambiguate Time, Date, and DateTime#to_json formatting.  #9750 [Geoff Buesing, Cheah Chu Yeow]
 
* Hash#to_json takes :only or :except options to specific or omit certain hash keys. Enumerable#to_json passes through its options to each element.  #9751 [Cheah Chu Yeow]
 
* BufferedLogger#auto_flushing = N flushes the log every N messages. Buffers with an array instead of string. Disabling auto_flushing still flushes when the buffer hits a maximum size, as a failsafe against memory-gobbling.  [Jeremy Kemper]
 
* Fixed Date#xmlschema for dates outside the range of what can be created with Time #9744 [Geoff Buesing]
 
* Fixed that La Paz was included in -25200 and -14400 offsets when it should only be in -14400 #9735 [bermi]
 
* Fixed JSON encoding to use quoted keys according to the JSON standard.  #8762 [choonkat, Cheah Chu Yeow]
 
* Alias Object#send to send! for Ruby 1.9 forward compatibility.  [Jeremy Kemper]
 
* Backport Object#instance_variable_defined? for Ruby < 1.8.6.  [Jeremy Kemper]
 
* BufferedLogger#add converts the message to a string.  #9702, #9724 [eigentone, DrMark, tomafro]
 
* Added ActiveSupport::BufferedLogger as a duck-typing alternative (albeit with no formatter) to the Ruby Logger, which provides a very nice speed bump (inspired by Ezra's buffered logger) [DHH]
 
* Object#instance_exec produces fewer garbage methods.  [Mauricio Fernandez]
 
* Decode json strings as Dates/Times if they're using a YAML-compatible format.  Closes #9614 [Rick]
 
* Fixed cache_page to use the request url instead of the routing options when picking a save path.  #8614 [Josh Peek]
 
* Object.subclasses_of includes anonymous subclasses.  [Jeremy Kemper]
 
* Fixed that pluralizing an empty string should return the same empty string, not "s".  #7720 [Josh Peek]
 
* Added call to inspect on non-string classes for the logger #8533 [codahale]
 
* Deprecation: remove deprecated :mday option from Time, Date, and DateTime#change.  [Jeremy Kemper]
 
* Fix JSON decoder with nested quotes and commas.  #9579 [zdennis]
 
* Hash#to_xml doesn't double-unescape.  #8806 [Ezran]
 
* Added Array#rand #9170 [Norbert Crombach]. Examples:
 
    [].rand       # => nil
    ['a'].rand    # => 'a'
    [1,2,3].rand  # => 1 or 2 or 3
 
* Deprecation: removed Reloadable.  [Jeremy Kemper]
 
* Make the utf-handler return the correct value for non-matching regular expressions. Closes #9049 [manfred]
 
* Add ljust, rjust and center to utf8-handler. Closes #9165 [manfred]
 
* Fix Time#advance bug when trying to advance a year from leap day.  Closes #8655 [gbuesing]
 
* Add support for []= on ActiveSupport::Multibyte::Chars. Closes #9142. [ewan, manfred]
 
* Added Array#extract_options! to encapsulate the pattern of getting an options hash out of a variable number of parameters.  #8759 [Norbert Crombach]
 
* Let alias_attribute work with attributes with initial capital letters (legacy columns etc).  Closes #8596 [mpalmer]
 
* Added Hash#except which is the inverse of Hash#slice -- return the hash except the keys that are specified [DHH]
 
* Added support for pluralization with a different starting letter than the singular version (cow/kine) #4929 [norri_b/hasmanyjosh]
 
* Demote Hash#to_xml to use XmlSimple#xml_in_string so it can't read files or stdin.  #8453 [candlerb, Jeremy Kemper]
 
* Backport clean_logger changes to support ruby 1.8.2 [mislav]
 
* Added proper handling of arrays #8537 [hasmanyjosh]
 
  Before:
    Hash.from_xml '<images></images>'
    # => {:images => nil}
 
    Hash.from_xml '<images><image>foo.jpg</image></images>'
    # => {:images => {:image => "foo.jpg"}}
 
    Hash.from_xml '<images><image>foo.jpg</image><image>bar.jpg</image></images>'
    # => {:images => {:image => ["foo.jpg", "bar.jpg"]}}
 
  After:
    Hash.from_xml '<images type="array"></images>'
    # => {:images => []}
 
    Hash.from_xml '<images type="array"><image>foo.jpg</image></images>'
    # => {:images => ["foo.jpg"]}
 
    Hash.from_xml '<images type="array"><image>foo.jpg</image><image>bar.jpg</image></images>'
    # => {:images => ["foo.jpg", "bar.jpg"]}
 
* Improve Time and Date test coverage.  #8646 [Josh Peek]
 
* Add Date#since, ago, beginning_of_day, and end_of_day. Date + seconds works now.  #8575 [Geoff Buesing]
 
* String#to_time overflows to DateTime. Add String#to_datetime.  #8572 [Geoff Buesing]
 
* Date.yesterday and .tomorrow.  #8571 [Geoff Buesing]
 
* Readable Date and DateTime#inspect.  #8570 [Geoff Buesing]
 
* Move common DateTime calculations to Date.  #8536 [Geoff Buesing]
 
* Added Date#change (like Time#change) [DHH]
 
* DateTime#to_time converts to Time unless out of range.  #8512 [Geoff Buesing]
 
* Date#to_datetime, #to_s(:rfc822).  #8512 [Geoff Buesing]
 
* Time durations use since instead of + for accuracy.  #8513 [Geoff Buesing]
 
* escape <'s and >'s in JSON strings. #8371 [Rick]
 
* Inflections: MatrixTest -> MatrixTests instead of MatricesTest.  #8496 [jbwiv]
 
* Multibyte strings respond_to the String methods they proxy so they can be duck-typed.  #6549 [Tuxie]
 
* Array#to_xml yields the builder just like Hash and ActiveRecord::Base.  #8472 [seth]
 
* Date, Time, and DateTime support formatting blocks in addition to strftime strings. Introduce :long_ordinal format, e.g. "February 21st, 2005".  #8191 [Coda Hale]
 
* Document Object#blank?.  #6491 [Chris Mear]
 
* Date, Time, and DateTime#to_json.  #8399 [wycats]
 
* Simplify API of assert_difference by passing in an expression that is evaluated before and after the passed in block. See documenation for examples of new API. [Marcel Molina Jr.]
 
* Added assert_difference and assert_no_difference to test/unit assertions [Tobias Luetke]
 
* Removed breakpointer and Binding.of_caller in favor of relying on ruby-debug by Kent Sibilev since the breakpointer has been broken since Ruby 1.8.4 and will not be coming back [DHH]
 
* Added parsing of file type in Hash.xml_in so you can easily do file uploads with base64 from an API [DHH]
 
    <person>
      <name>David</name>
      <avatar type="file" name="me.jpg" content_type="image/jpg">R0lGODlhkACZAPUAAM5lcfjrtMQCG=\n</avatar>
    </person>
  
  ...becomes:
  
    attributes = { :person => { :name => "David", :avatar => #<StringIO> } }
    attributes[:person][:avatar].content_type      # => "image/jpg"
    attributes[:person][:avatar].original_filename # => "me.jpg"
    attributes[:person][:avatar].read # => binary data of the file
  
  Which is duck-type compatible with the files that you get when doing multipart uploads through HTML.
 
* Improved multibyte performance by relying less on exception raising #8159 [Blaine]
 
* Use XSD-compatible type names for Hash#to_xml and make the converters extendable #8047 [Tim Pope]
 
* Added yielding of builder in Hash#to_xml [DHH]
 
* Hash#with_indifferent_access now also converts hashes kept in arrays to indifferent access (makes it easier to treat HTML and XML parameters the same) [DHH]
 
* Hash#to_xml supports YAML attributes.  #7502 [jonathan]
 
* Refactor ActiveSupport::JSON to be less obtuse.  Add support for JSON decoding by way of Syck with ActiveSupport::JSON.decode(json_string).  Prevent hash keys that are JavaScript reserved words from being unquoted during encoding.  [Sam Stephenson]
 
* alias_method_chain preserves the original method's visibility.  #7854 [Jonathan Viney]
 
* Update Dependencies to ignore constants inherited from ancestors. Closes #6951. [Nicholas Seckar]
 
* Array#to_query preserves its ordering.  #7756 [Greg Spurrier]
 
* Out-of-range Time calculations transparently overflow to DateTime. Introduce Time#to_datetime.  #7706, #7715 [Geoff Buesing]
 
* DateTime calculations analogous to the Date and Time extensions.  #7693 [Geoff Buesing]
 
* Give DateTime correct .to_s implementations, lets it play nice with ActiveRecord quoting.  #7649 [Geoff Buesing]
 
* Add File.atomic_write,  allows you to write large files in an atomic manner, preventing users from seeing half written files.  [Koz]
 
* Allow users to provide custom formatters to Logger. [aeden]
 
* Hash#to_query CGI-escapes its keys.  [Jeremy Kemper]
 
* Optimize Class Inheritable Attributes so that unnecessary hashes are not created.  Closes #7472 [Bruce Perens]
 
* :db format for Date#to_s [Jeremy Kemper]
    Date.new(2007, 1, 27).to_s(:db) # => '2007-01-27'
 
* Added :instance_writer option to #mattr_writer/accessor, #cattr_writer/accessor, and #class_inheritable_writer to skip the creation of the instance writer.  [Rick]
 
* Added Hash#to_query to turn a hash of values into a form-encoded query string [Nicholas Seckar]
 
* Increase test coverage for subclasses_of. Closes #7335. [Roman2K, Nicholas Seckar]
 
* Remove unused code from Duration#inspect.  Closes #7180.  [Rich Collins]
 
* Added test coverage for Inflector.inflections.clear.  Closes #7179. [Rich Collins]
 
* ActiveSupport::Multibyte::Handlers::UTF8Handler should raise when a range and an integer are passed in (just like the native implementation).  Closes #7176 [Rich Collins]
 
* A couple extra tests for #classify.  Closes #7273. [Josh Susser]
 
* Better docs for Object extensions [zackchandler, Jamis Buck]
 
* Fix that Dates couldn't be subtracted from Dates after [5940].  [Sam Stephenson]
 
* Add Object#acts_like? and Time#acts_like_time? and Date#acts_like_date? to facilitate duck-typing. [Jamis Buck]
 
* Make 1.months and friends accurate by introducing a Duration class.  #6835 [eventualbuddha]
 
 
*1.4.2* (March 12th, 2007)
 
* Ruby 1.8.6 and 1.9 define private Time#to_date and #to_datetime; make them
public for compatibility.  [Jeremy Kemper]
 
* Deprecation: warn on stderr if RAILS_DEFAULT_LOGGER isn't set yet.  [Jeremy Kemper]
 
 
*1.4.1* (February 5th, 2007)
 
* Optimize Class Inheritable Attributes so that unnecessary hashes are not created.  Closes #7472 [Bruce Perens]
 
* Added :instance_writer option to #mattr_writer/accessor, #cattr_writer/accessor, and #class_inheritable_writer to skip the creation of the instance writer.  [Rick]
 
* Full test coverage for Inflector.  #7228 [Dan Kubb]
 
 
*1.4.0* (January 16th, 2007)
 
* Document Inflector.ordinalize and merge docs from String inflections.  #7023 [smeade]
 
* Unbundle flexmock.  [Jeremy Kemper]
 
* Fix Dependencies.autoloaded? to ignore anonymous modules. Closes #6561. [Nicholas Seckar]
 
* Update load once paths to prevent nested once constants from being detected and claimed by an external non-once load. [Nicholas Seckar]
 
* Deprecation: silence warnings when reporting test errors.  [Jeremy Kemper]
 
* Hash#slice(*keys) returns a new hash with only the given keys. #slice! replaces the hash with only the given keys. Works with HashWithIndifferentAccess also.  [Jeremy Kemper]
 
* HashWithIndifferentAccess#to_hash converts to a Hash with String keys and the same default value.  [Jeremy Kemper]
 
* Fix remove_constant to correctly handle constant names of the form "::A::...". References #6720. [Nicholas Seckar]
 
* Fixed Array#to_xml when it contains a series of hashes (each piece would get its own XML declaration) #6610 [thkarcher/cyu]
 
* Added Time#to_s(:time) which will just return H:M, like 17:44 [DHH]
 
* Add Module#attr_accessor_with_default to initialize value of attribute before setting it. Closes #6538. [Stuart Halloway, Marcel Molina Jr.]
 
* Hash#to_xml handles keys with the same name as Kernel methods.  #6613 [Catfish]
 
* Added Time#end_of_day to get 23:59:59 of that day [DHH]
 
* Don't quote hash keys in Hash#to_json if they're valid JavaScript identifiers.  Disable this with ActiveSupport::JSON.unquote_hash_key_identifiers = false if you need strict JSON compliance. [Sam Stephenson]
 
* Lazily load the Unicode Database in the UTF-8 Handler [Rick Olson]
 
* Update dependencies to delete partially loaded constants. [Nicholas Seckar]
 
* Fix unicode JSON regexp for Onigurama compatibility.  #6494 [whitley]
 
* update XmlSimple to 1.0.10. Closes #6532. [nicksieger]
 
* Update dependencies to allow constants to be defined alongside their siblings. A common case for this is AR model classes with STI; user.rb might define User, Administrator and Guest for example. [Nicholas Seckar]
 
* next_week respects DST changes.  #6483, #5617, #2353, #2509, #4551 [marclove, rabiedenharn, rails@roetzel.de, jsolson@damogran.org, drbrain@segment7.net]
 
* Expose methods added to Enumerable in the documentation, such as group_by. Closes #6170. [sergeykojin@gmail.com, Marcel Molina Jr.]
 
* Ensure Chars#tidy_bytes only tidies broken bytes. Closes #6397 [Manfred Stienstra]
 
* Add 'unloadable', a method used to mark any constant as requiring an unload after each request. [Nicholas Seckar]
 
* Make core_ext/string/access.rb multibyte safe. Closes #6388 [Manfred Stienstra]
 
* Make String#chars slicing behaviour consistent with String. Closes #6387 [Manfred Stienstra]
 
* Pull in latest multibyte patch. Closes #6346 [Manfred Stienstra]
 
* Add ActiveSupport::Multibyte.  Provides String#chars which lets you deal with strings as a sequence of chars, not of bytes. Closes #6242 [Julian Tarkhanov, Manfred Stienstra, Thijs van der Vossen & Jan Behrens]
 
* Fix issue with #class_inheritable_accessor saving updates to the parent class when initialized with an Array or Hash [mojombo]
 
* Hash#to_xml supports Bignum and BigDecimal.  #6313 [edibiase]
 
* Don't undefine #class in OptionMerger [Rick]
 
* Hash.create_from_xml has been renamed to Hash.from_xml, alias will exist until Rails 2.0 [DHH]
 
* alias_method_chain works with accessor= methods also.  #6153 [Caio Chassot]
 
* Fix loadable_constants_for_path to handle load paths that do not end with a slash. [Nicholas Seckar]
 
* Fix logic error in determining what was loaded by a given file. Closes #6039. [Nicholas Seckar]
 
* Equate Kernel.const_missing with Object.const_missing. Fixes #5988. [Nicholas Seckar]
 
* Add ApplicationController special case to Dependencies. [Nicholas Seckar]
 
* Don't pad remaining places with in_groups_of if specified padding value is false. [Marcel Molina Jr.]
 
* Fix cases where empty xml nodes weren't being translated to nil in Hash.create_from_xml [Rick Olso n]
 
  <written-on type="date"></written-on> # => { :type => 'date' } # WRONG
  <written-on type="date"></written-on> # => nil # RIGHT
 
* Tighten rescue clauses.  #5985 [james@grayproductions.net]
 
* Inflections: don't singularize -ies plurals.  [foamdino@gmail.com, Mark Van Holstyn]
 
* Update Initializer to use load_once_paths to avoid plugin reloading. References #5852. [Nicholas Seckar]
 
* Use Array#assoc in ActiveSupport::OrderedHash. [Mauricio Fernandez]
 
* Greatly increased performance of String.to_json, which speeds up RJS considerably on large pages, fixes #3473 [Shugo Maeda]
 
* Detect missing_constants calls from removed modules and fail accordingly. [Nicholas Seckar]
 
* Stop using defined? in Dependencies.qualified_const_defined? since defined? may invoke const_missing. [Nicholas Seckar]
 
* Dependencies can autoload directories of nested classes. [Jeremy Kemper]
    Example:
      invoice.rb            class Invoice
      invoice/lineitem.rb   class Invoice::Lineitem
 
* Add Deprecation.silence so that Reloadable does not scold itself. [Nicholas Seckar]
 
* Add debugging logging to Dependencies. Currently can be enabled with Dependencies.log_activity = true; adding to Initializer and documenting is forthcoming. [Nicholas Seckar]
 
* Replace Reloadable with improvements to the Dependencies mechanism. [Nicholas Seckar]
 
* DateTime#to_time gives hour/minute/second resolution.  #5747 [jon.evans@pobox.com]
 
* attr_internal to support namespacing and deprecation. Like attr_* except backed by internally-named instance variable. Set attr_internal_naming_format to change the format from the default '@_%s'. [Jeremy Kemper]
    # def foo()   @foo__rofl      end
    # def foo=(v) @foo__rofl = v  end
    self.attr_internal_naming_format = '@%s__rofl'
    attr_internal :foo
 
* Raise fully qualified names upon name errors. #5533 [lars@pinds.com, Nicholas Seckar]
 
* Add extention to obtain the missing constant from NameError instances. [Nicholas Seckar]
 
* Thoroughly document inflections.  #5700 [petermichaux@gmail.com]
 
* Added Module#alias_attribute [Jamis/DHH]. Example:
 
    class Content < ActiveRecord::Base
      # has a title attribute
    end
 
    class Email < ActiveRecord::Base
      alias_attribute :subject, :title
    end
 
    e = Email.find(1)
    e.title    # => "Superstars"
    e.subject  # => "Superstars"
    e.subject? # => true
    e.subject = "Megastars"
    e.title    # => "Megastars"
 
* Deprecation: easier to work with warning behavior as procs; default behaviors for each environment so users needn't update env.rb; and testing pleasure with assert_deprecated, assert_not_deprecated. [Jeremy Kemper]
  By default, test prints to $stderr, dev logs, production ignores.
  Provide your own per-environment in e.g. config/environments/development.rb:
    ActiveSupport::Deprecation.behavior = Proc.new { |message| raise message }
 
* First cut of the Rails Deprecation system.   [Koz]
 
* Strip boolean XML content before checking for 'true' [Rick Olson]
 
* Customize default BigDecimal formatting. References #5672 [dave@pragprog.com]
 
* Correctly convert <foo nil="true"> to nil when using Hash.create_from_xml.  [Rick]
 
* Optional identity for Enumerable#sum defaults to zero. #5657 [gensym@mac.com]
 
* HashWithIndifferentAccess shouldn't confuse false and nil. #5601 [shugo@ruby-lang.org]
 
* Fixed HashWithIndifferentAccess#default #5586 [chris@seagul.co.uk]
 
* More compatible Hash.create_from_xml. #5523 [nunemaker@gmail.com]
 
* Added Enumerable#sum for calculating a sum from the elements [DHH, jonathan@daikini.com]. Examples:
 
    [1, 2, 3].sum
    payments.sum { |p| p.price * p.tax_rate }
    payments.sum(&:price)
 
  This is instead of payments.inject(0) { |sum, p| sum + p.price }
 
* Correct and clarify Array#to_sentence docs.  #5458 [brad@madriska.com]
 
* alias_method_chain preserves method punctuation so foo, foo?, and foo! may be chained with the same feature. [Jeremy Kemper]
    Example:
      alias_method_chain :save!, :validation
    is equivalent to
      alias_method :save_without_validation!, :save!
      alias_method :save!, :save_with_validation!
 
* Enhance Symbol#to_proc so it works with list objects, such as multi-dimensional arrays. Closes #5295 [nov@yo.rim.or.jp].  Example:
 
    {1 => "one", 2 => "two", 3 => "three"}.sort_by(&:first).map(&:last)
    #=> ["one", "two", "three"]
 
* Added Hash.create_from_xml(string) which will create a hash from a XML string and even typecast if possible [DHH]. Example:
 
    Hash.create_from_xml <<-EOT
      <note>
        <title>This is a note</title>
        <created-at type="date">2004-10-10</created-at>
      </note>
    EOT
  
  ...would return:
  
    { :note => { :title => "This is a note", :created_at => Date.new(2004, 10, 10) } }
 
* Added Jim Weirich's excellent FlexMock class to vendor (Copyright 2003, 2004 by Jim Weirich (jim@weriichhouse.org)) -- it's not automatically required, though, so require 'flexmock' is still necessary [DHH]
 
* Fixed that Module#alias_method_chain should work with both foo? foo! and foo at the same time #4954 [anna@wota.jp]
 
* to_xml fixes, features, and speedup: introduce :dasherize option that converts updated_at to updated-at if true (the existing default); binary columns get encoding="base64" attribute; nil values get nil="true" attribute to distinguish empty values; add type information for float columns; allow arbitrarily deep :include; include SQL type information as the type attribute.  #4989 [Blair Zajac <blair@orcaware.com>]
 
* Add OrderedHash#values. [Sam Stephenson]
 
* Added Array#to_s(:db) that'll produce a comma-separated list of ids [DHH]. Example:
    
    Purchase.find(:all, :conditions => "product_id IN (#{shops.products.to_s(:db)})"
 
* Normalize classify's argument to a String so that it plays nice with Symbols. [Marcel Molina Jr.] 
 
* Strip out leading schema name in classify. References #5139. [schoenm@earthlink.net]
 
* Remove Enumerable#first_match since break(value) handles the use case well enough. [Nicholas Seckar]
 
  Enumerable#first_match was like detect, but instead of returning the matching element, the yielded value returned. For example:
  
    user_xml = adapters(:from => User, :to => Xml).first_match do |adapter|
      adapter.adapt @user
    end
  
  But this is just as easily done with:
  
    user_xml = adapters(:from => User, :to => Xml).each do
      break adapter.adapt(@user)
    end
  
* Make Array#in_groups_of just return the grouped collection if a block isn't given. [Marcel Molina Jr.] 
 
* Don't destroy a HashWithIndifferentAccess if symbolize_keys! or  stringify_keys! is called on it. Closes #5076. [Marcel Molina Jr., guy.naor@famundo.com]
 
* Document Module::delegate. #5002 [pergesu@gmail.com]
 
* Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.]
 
* Strip out punctuation on predicates or bang methods being aliased with alias_method_chain since target?_without_feature is not a valid method name. Add tests for Module#alias_method_chain. [Marcel Molina Jr.]
 
* Replace Ruby's deprecated append_features in favor of included. [Marcel Molina Jr.]
 
* Allow default options in with_options to be overridden. Closes #4480. [murphy@cYcnus.de] 
 
* Added Module#alias_method_chain [Jamis Buck]
 
* Updated to Builder 2.0 [DHH]
 
* Add Array#split for dividing arrays into one or more subarrays by value or block. [Sam Stephenson]
 
*1.3.1* (April 6th, 2006)
 
* Clean paths inside of exception messages and traces. [Nicholas Seckar]
 
* Add Pathname.clean_within for cleaning all the paths inside of a string. [Nicholas Seckar]
 
* provide an empty Dependencies::LoadingModule.load which prints deprecation warnings.  Lets 1.0 applications function with .13-style environment.rb.
 
 
*1.3.0* (March 27th, 2006)
 
* When possible, avoid incorrectly obtaining constants from parent modules. Fixes #4221. [Nicholas Seckar]
 
* Add more tests for dependencies; refactor existing cases. [Nicholas Seckar]
 
* Move Module#parent and Module#as_load_path into core_ext. Add Module#parent. [Nicholas Seckar]
 
* Add CachingTools::HashCaching to simplify the creation of nested, autofilling hashes. [Nicholas Seckar]
 
* Remove a hack intended to avoid unloading the same class twice, but which would not work anyways. [Nicholas Seckar]
 
* Update Object.subclasses_of to locate nested classes. This affects Object.remove_subclasses_of in that nested classes will now be unloaded. [Nicholas Seckar]
 
* Update Object.remove_subclasses_of to use Class.remove_class, reducing duplication. [Nicholas Seckar]
 
* Added Fixnum#seconds for consistency, so you can say 5.minutes + 30.seconds instead of 5.minutes + 30 #4389 [François Beausoleil]